Book digitized by Google from the library of the University of Michigan and uploaded to the Internet Archive by user tpb.
At head of title: Geological survey of Pennsylvania, 1874-75
Charts and diagrams partly in pockets
Appendices: A. Section of the Palœozoic rocks in Blair county, by F. Platt and R.H. Sanders.--B. A measured section of the Palæozic rocks between Lock Haven and Farrandsville, by H.M. Chance.--C. Catalog of specimens collected by Mr. Ashburner.--D. Railway and other levels above tide mentioned in this report
At head of title: Geological survey of Pennsylvania: 1874-75.